TabBar: fixed single-tab not shrinking their width down.

+ minor typo fixes (#2738)

docs/CHANGELOG.txt

@@ -38,6 +38,7 @@ Other Changes:
   Note that some elements won't accurately fade down with the same intensity, and the color wheel
   when enabled will have small overlap glitches with (style.Alpha < 1.0).
 - TabBar: fixed ScrollToBar request creating bouncing loop when tab is larger than available space.
+- TabBar: fixed single-tab not shrinking their width down.
 - Backends: DX11: Fixed GSGetShader() call not passing an initialized instance count,
   would generally make the debug layer complain (Added in 1.72).
 - Backends: Vulkan: Added support for specifying multisample count.

examples/imgui_impl_opengl2.cpp

@@ -24,7 +24,7 @@
 //  2018-08-03: OpenGL: Disabling/restoring GL_LIGHTING and GL_COLOR_MATERIAL to increase compatibility with legacy OpenGL applications.
 //  2018-06-08: Misc: Extracted imgui_impl_opengl2.cpp/.h away from the old combined GLFW/SDL+OpenGL2 examples.
 //  2018-06-08: OpenGL: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
-//  2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplGlfwGL2_RenderDrawData() in the .h file so you can call it yourself.
+//  2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplOpenGL2_RenderDrawData() in the .h file so you can call it yourself.
 //  2017-09-01: OpenGL: Save and restore current polygon mode.
 //  2016-09-10: OpenGL: Uploading font texture as RGBA32 to increase compatibility with users shaders (not ideal).
 //  2016-09-05: OpenGL: Fixed save and restore of current scissor rectangle.

imgui.cpp

@@ -638,7 +638,7 @@ CODE
     - In the examples/ bindings, for each graphics API binding we decided on a type that is likely to be a good representation for specifying
       an image from the end-user perspective. This is what the _examples_ rendering functions are using:
 
-         OpenGL:     ImTextureID = GLuint                       (see ImGui_ImplGlfwGL3_RenderDrawData() function in imgui_impl_glfw_gl3.cpp)
+         OpenGL:     ImTextureID = GLuint                       (see ImGui_ImplOpenGL3_RenderDrawData() function in imgui_impl_glfw_gl3.cpp)
          DirectX9:   ImTextureID = LPDIRECT3DTEXTURE9           (see ImGui_ImplDX9_RenderDrawData()     function in imgui_impl_dx9.cpp)
          DirectX11:  ImTextureID = ID3D11ShaderResourceView*    (see ImGui_ImplDX11_RenderDrawData()    function in imgui_impl_dx11.cpp)
          DirectX12:  ImTextureID = D3D12_GPU_DESCRIPTOR_HANDLE  (see ImGui_ImplDX12_RenderDrawData()    function in imgui_impl_dx12.cpp)

imgui_widgets.cpp

@@ -1361,7 +1361,11 @@ static int IMGUI_CDECL ShrinkWidthItemComparer(const void* lhs, const void* rhs)
 // Shrink excess width from a set of item, by removing width from the larger items first.
 void ImGui::ShrinkWidths(ImGuiShrinkWidthItem* items, int count, float width_excess)
 {
-    if (count > 1)
+    if (count == 1)
+    {
+        items[0].Width -= width_excess;
+        return;
+    }
     ImQsort(items, (size_t)count, sizeof(ImGuiShrinkWidthItem), ShrinkWidthItemComparer);
     int count_same_width = 1;
     while (width_excess > 0.0f && count_same_width < count)